.icon {
    width: 1em; height: 1em;
    vertical-align: -0.15em;
    fill: currentColor;
    overflow: hidden;
 }

 html,
 body,
 #app,
 .common-layout,
 .el-container{
    height: 100%;
 }
 *{
   margin: 0;
   padding: 0;
 }
